i'm in need of some help creating an scp story arch, currently the prospect of my idea is a safe class object with close to no containment procedures, this scp is essentially harmless, and is located in Norway.

the idea for the scp is that it is a beach that sings for other peoples pleasure (my current scp name idea is mocking bird bay), however you have to want to hear it in order to be able to hear its voice. the voice is of a female, no older than the age of 30.

the beach stays active throughout all periods and has been accounted for in records dating back millions of years. i'm a new comer so need a bit of help writing this scp and getting some ideas and or pictures. thanks.

however you have to want to hear it in order to be able to hear its voice

If that is the case, then how did the first person to ever discover the SCP even know what to look for?

a beach that sings for other peoples pleasure

So what is the beach's motivations? Does it just want to sing for people who can hear it? Is it for company? Is there hidden motive behind the action?

has been accounted for in records dating back millions of years.

While you can show this aspect, you ought to consider if it makes sense for the article. So what if it is around before the human race? What does that imply? Were there other races/species that it sang to many eons ago? What happened to those bygone peoples, if that is the case?

i was thinking about having it been discovered by ancient species currently un accounted for, before humans and dinosaurs were around, if i do implement this idea i would like to use a picture of an old tapestry or manuscript to signify its age and presence over the course of earths history.

the origin of the scp would date back so far that it would be almost impossible to discover how it was first discovered, although the foundation would know of its location due to the old relics and artifacts previously mentioned

i have tried to make the beach follow the characteristics of a mocking bird, as in that you shouldn't harm it or attack it, because it only sings for other peoples entertainment, hence the name mocking bird bay

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So, let me get this straight:
It's essentially a really old Beach that sings to you if you want.
Am I correct?

ancient species currently un accounted for

A species of "higher-intelligence"? Advanced civilization? Do tell.

Lastly:

close to no containment procedures,

Huh? I don't think the Foundation would just let anybody have access to an anomalous beach without any type of cover story. If the Foundation allowed public access to the beach, they would likely have some sort of cover story, perhaps a female pretend to sing or something. I am not sure.